CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



[Bull. 



Clam, damage to, caused by starfish, 



39, 57- 



Oassification of Echinoderms, 13. 

 Cleavage of egg, sea-urchin, 101. 

 Cloaca, holothurian, 118. 

 Clypeastroidea, 92, 104. 



anatomy, 92. 

 . development, 104. 



locomotion, 94. 

 Common starfish, 59. 



description, 59. 



development, 52. 



See also Asteroidea. 

 Common Synapta, 138. 

 Common Thyone, 133. 

 Cribrella sanguinolenta, 65. . 

 Crinoidea, 13. 



Cucumaria pulcherrima, 15, 124, 129, 

 130. 



description, 131. 



food, 124. 



geographical distribution, 130. 



Daisy Brittle-star, 80. 



Damage to oysters and other mol- 



lusks by starfishes, 33. 

 Development, blood starfish, 58. 



clypeastroids, 104. 



common starfish, 52. 



echinoids, 100. 



holothnrians, 128. 



key-hole urchin, 104. 



northern starfish, 58. 



ophiurans, 77. 



sand-dollar, 104. 



slender-armed starfish, 58. 

 Digestive system, key-hole urchin, 



95- 



ophiuran, 73. 

 sand-dollar, 97. 

 sea-urchin, 89. 

 starfish, 25. 

 Disk-urchin, anatomy, 92. 



Echinarachnius parma, 14, 16, 92, 93, 

 95, 1 06, no. 



description, in. 



geographical distribution, no. 



habits, 1 10. 



Echinodermata, characters, 12. 

 Echinoderms, economic importance, 

 16. 



literature, 144. 



methods of preservation, 17. 



scientific interest in, 16. 

 Echinoidea, 14, 85. 



development, 100. 



digestive system, 89. 



food, 99. 



habits, 97. 



internal anatomy, 89, 94. 



key to species, 106. 



locomotion, 97. 



natural enemies, 99. 



nervous system, 91. 



reproduction, 100. 



reproductive system, 91. 



structure, 85. 



water-vascular system, 90. 

 Eggs, number produced by echi- 

 noids, 100. 

 Eleutherozoa, 13. 

 Embryo, ophiuran, 77. 



sea-urchin, 102. 



starfish, 53. 



Fertilization, ophiuran, 77. 



sea-urchin, 100. 



starfish, 49. 

 Food, disk-urchin, 96, 99. 



echinoid, 99. 



holothurian, 122. 



ophiuran, 75. 



sea-urchin, 90, 99. 



starfish, 29. 

 Forcipulata, 59. 



Green ophiuran, 79. 

 Green sea-urchin, 108. 



Habits, Cucumaria, 124. 



echinoids, 97. 



holothurians, 122. 



ophiurans, 73. 



starfish, 28. 



Synapta, 124. 



Thyone, 122. 



Henricia, breeding habits, 33, 52. 

 Henricia sanguinolenta, 13, 14, 59, 

 65.. 



description, 66. 



geographical distribution, 65. 

 Holothuroidea, 15, 114. 



alimentary canal, 116. 



autotomy, 125. 



body walls, 121. 



calcareous ring, 118. 



cloaca, 118. 



development, 128. 



food, 122. 



habits, 122. 



internal anatomy, 116. 



key to species, 129. 



musculature, 121. 



nervous system, 121. 



regeneration, 126. 



